Malicious PDF — malware analysis report

Static analysis result for SHA-256 30d1289edabb1881…

MALICIOUS

PDF

73.8 KB Created: 2021-02-27 12:44:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d09f7b62121bf62d65ee3caaa6b7f969 SHA-1: 74a736d83db452dcdcf32ccf6710fd2b225d3aa0 SHA-256: 30d1289edabb1881012c3ec0be59e4ace4c9cd95c450e5cae3caab89217c1559
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body, though heavily obfuscated, contains keywords related to sales, and numerous external URIs were extracted, suggesting a phishing or malware distribution scheme. The presence of embedded links points towards an attempt to redirect the user to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://soxebez.ru/wix?keyword=butterfly+bush+cuttings+for+sale PDF link annotation
    • https://cdn.sqhk.co/jivazufevi/eE8igie/tikaxufeguvewamapatewe.pdfIn PDF document text
    • http://hisgohar.site/ruwipobuvijifegupm26ha.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470028/normal_60153be473d63.pdfIn PDF document text
    • https://cdn.sqhk.co/rawerusiwala/W8vjcS1/inter_football_manager_lite_app.pdfIn PDF document text
    • http://flathead.us/epidemic_curved99b0.pdfIn PDF document text
    • http://sportita.fun/descente_ski_jacket_size_guideicdyu.pdfIn PDF document text
    • https://futinenapol.weebly.com/uploads/1/3/1/4/131438538/4442461.pdfIn PDF document text
    • http://kartaidatodemeleri.com/frog_jumper_militarywzm02.pdfIn PDF document text
    • https://cdn.sqhk.co/devisojop/jjCelgg/kaxefiwusipibebizix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402724/normal_5ffb4cd536225.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371808/normal_602640013d9e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490369/normal_6016231d46a38.pdfIn PDF document text
    • https://gemexufata.weebly.com/uploads/1/3/0/7/130739895/7907760.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450731/normal_5ffcb9dd1ba58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365653/normal_5ffed173ad76b.pdfIn PDF document text
    • http://1xbet-football.fun/bg_voz_informacije_kontaktz8d17.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE509 5436 bytes
SHA-256: 52adde0aaf0b954f604361e8ffafb034e15f1c63def77d6657bc7377f669510b
font_01_sfnt_off0000f78f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78F 10184 bytes
SHA-256: 15971897d23c7a107439a4a9cd97136f82f4f555c3f3c6b92177460f02c85bf3

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